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- Title
RECOVERY AND UTILIZATION OF PROTEIN DERIVED FROM SURIMI WASH-WATER.
- Authors
STINE, J.J.; PEDERSEN, L.; SMILEY, S.; BECHTEL, P.J.
- Abstract
ABSTRACT Surimi processors are committed to improve utilization of seafood resources, increase productivity and reduce organic matter discharged into the environment. The object of this study was to recover protein from pollock surimi processing wash-water using membrane filtration and characterize properties of the recovered material. A pilot unit equipped with membrane elements concentrated protein from the surimi wash-water. Membrane concentrate and control surimi samples were analyzed for proximate composition, lipid oxidation, color, sodium dodecyl sulfate gel electrophoresis, amino acids and minerals. Membrane concentrate, membrane concentrate plus surimi and control surimi were monitored for 180 days of storage at −20C. The membrane concentrate had significantly higher moisture and lipid, but lower protein content than surimi. As determined by sodium dodecyl sulfate polyacrylamide gel electrophoresis, membrane concentrate proteins displayed a greater amount of lower molar mass molecules compared with surimi. The amino acid profile was comparable to control surimi and the recovered membrane concentrate proteins had similar nutritional values to that of surimi. The results indicate that the addition of 5% membrane concentrate to surimi will not adversely affect the storage at −20C and that the recovered wash-water protein could be used to obtain a fish protein ingredient or added back at a low percentage to surimi products. PRACTICAL APPLICATIONS In order to increase productivity and improve utilization of seafood resources, surimi processors are looking into alternative technologies to recover proteins and other material from the wastewater. Membrane filtration is a promising option for the concentration of wastewater. This study was conducted to determine the recovery and characterize the material recovered from surimi wash-water using a commercial membrane filtration unit. It was demonstrated that the recoverable material is nutritionally similar to the final surimi product and that the overall yield can be increased using membrane technology. In addition to the benefit of recovering protein, the membrane filtration can reduce the amount of material in the waste stream.
- Subjects
SEAFOOD; SURIMI; ORGANIC compounds; MEMBRANE separation; LIPIDS; FISH protein concentrate; INDUSTRIAL wastes
- Publication
Journal of Food Quality, 2012, Vol 35, Issue 1, p43
- ISSN
0146-9428
- Publication type
Article
- DOI
10.1111/j.1745-4557.2011.00424.x